Answer: The correct answer is "electromagnetic wave".
Step-by-step explanation:
Electromagnetic waves: These waves are produced by vibration of the charged particles. But the mechanical waves are caused by wave amplitude.
Electromagnetic wave does not need a medium while the mechanical wave needs a medium to travel.
The electromagnetic wave travels with the speed of the light. The example of electromagnetic wave is light.
Mechanical waves are of two types: Longitudinal wave and Transverse.
Sound wave is a longitudinal wave. It consists of compression and rarefaction.
Therefore, Light travels as an electromagnetic wave.